Tool and extractor



Aug. 7, 1934. F. .1. R088 TOOL AND EXTRACTOR Filed May 25, 1955 p INVENTOR. Jrank ;7 $05.;

Patented Aug. 7, 1934 meant ilbea izefi V TOOL AND EXTRAOTOR 7 Frank Joseph Ros s, Detroih Mich. Application my 25, 1933, s riaiuojmzas'i This invention relates to tools and tool retainers, and particularlyto interchangeable or removable punching, drilling and cutting tools, especially those having shank portions adapted to C; be held in a retainer, chuck or collet, while the working portion of the tool projects therefrom.

Interchangeable punches and dies are particularly benefited by the application of my invention thereto, particularly when held in retainers of .10 the so-calledinterchangeable type, and an important object of the invention is the provision of means whereby interchangeable punches may be removed and replaced, eventhough broken, 7 d I 'therein and carrying mechanism for locking and from places in which they would ordinarily be in- ;.1.5 accessible and it would be necessary to partially dismantle the punch press or other machine to efiect removal and replacement of a broken tool.

A further object is the provision of means whereby a broken punch mounted in an interchangeable retainer carried by the punch holder of a punch press may easily and quickly be removedfrom the retainer and a new one inserted without disturbing the stripper plate or dismantling other portions of the machine, even though an installed punch ispartially or entirely screened or rendered inaccessible by a stripper plate also carried by the punch holder -which is a common construction in which the punch ordinarily only projects through the stripper plate while performing a punching operation.

Another object is the provision of a shanked tool, such as a punch, havingv an irregular looking portion carried by its shank adapted to be engaged by an extractingja'nd handling tool to f enable the shanked tool or punch to be drawn from its socket and a new one inserted froma remote point. i V .Other objects and advantages will be apparent from the following description, wherein reference is made to the accompanying drawing illustrating preferred embodiments of myjinvention, l and wherein similar reference numerals designate similar parts throughout the severalviews, 'Inthedrawing: Figure 1 is a fragmentary sectional View of a combination punch press and shear constituting an illustrativev machine affording a useful application of my invention, showing a punch held in an interchangeable retainer and in the process 7 5 0 of performing work upon sheet metal stock;

Figure 2 is a partly sectional and partly side elevational View of my improved punch with the extracting and handling tool attached thereto, fragmentarily showing a stripper plate through which the tool is passed to engage the punch;

Figure 3 is a similar view of a modification; I

acter 10, designates the bed of a punch press is a similar view of another modifisubstantially on the which carries a die plate .11, above which is vertically reciprocable a punch holder 12, the mechanism for moving which, forming no part of this,

invention, is not shown.

Supported by the punch holder is shown a singleretainer block lhaving apunch socket l5 releasing at .will aipunch in the socket. Obvi-z;

'ously in practise a plurality of nested punches .might be-used. The punch-locking and releasing mechanism may be of any desired type and construction, that shown being a popular form in which a locking detent 16 is slidable in a lateral if channel into. and from the punch socket, being actuated and held in position by a combined wedge and'actuatin'g cam 17 having a front face arranged at a wedging angle with relationto a similarly inclined rear face of detent 16, so that it may lock the detent in projected po- (the wedge) sition whenengaged between the rear faceof the detent and the end, of the channel. The wedge-cam is ,manipulatable by means of a plunger 18, which may, as shown, project from the rei tainer block; member 17 being urged toward lock ir'i'g position (and the detent also urged intothe punch socket) by means of a; spring 20. An aperture 19 in thestripper plate25, in alignmentwith the-plunger, permits, manipulation of the latter from beneath, as by means of a rod or other suita b1e.tool,(not shown) which may be passed therethrough for the purpose. I

The particular press ,co-nstruction shown also carries a shearing blade22, adaptedto trim the edge of the stock 23, asshown, concurrently with the punching operation,although this will be seen to be, immaterial insofar as my present invention 'is concerned. The stripper plate 25 also carried by the punch holder is spring-mounted as by slide ,bolts 13 in such manner that its lower surface ordinarily projectsbelo w the end of. the punch 26, while when the punch holder descends to perform a punching operation the stripper plate is forced upward, or rather held by the work as the punch J continues to descend, thus compressing the spring 27 while thepunch is projected through and from 'theclearance aperture 28in the stripper plate;

The clearance aperture is made larger than both the working portion of the punch and than its shank portion 26; which shank portion also is wrench 32 first described, to receive the lower end larger than the working portion 26. of the punch, and provided also with an up- Upon or immediately beneath the shank portion wardly extending portion 40 of enlarged internal of the punch,'in any event preferably upon a pordiameter adapted to receive the lower end of the 5 tion thereof heavier than the working portion punch shank 26 (below the circumferential slot 80 and so less likely to break, tapered threads, 30, 31 which may be somewhat reduced in diameter, are out upon the outer surface. As best shown as shown. Carried by such upper portion 40 of in Figure 2, the clearance between the punch and the wrench are. inwardly projecting interlocking the walls oftheclear'ance aperture in'the strip- :lug portions 35 proportionedktofclear and slide per plate, is-suihcient-to permit not only passage over the flattened lowerportion-=when=turned to 85 of the shank of the punch therethrough but.inwone.position, but to fit into andinterlock with sertion of a socket'wrench, as 32, proportioned to the circumferential slot when partially turned fit thereinto and to receive within itself the work- -from such position, to couple the wrench and ing portion of the punch, which mayextend-into ,punch. In the shown construction the use of the socket 33 in the body of the wrench. At'its 'four flats and complementary portions of the 90 upper extremity the wrench is providedcwith ta- -ssocket wrenchiresults in a virtual squaring of the pered female threads 35 engageable with the com interlocking. parts and permits locking and replementary male threads (30) of the punch. leasing the punch by a quarter turn of the wrench.

It will be seen that by virtue of thisvzconstrucit will be apparent that the illustrated tion, the socket wrench may be projected through embodiments of my invention herein disclosed 95 the stripper plate into-engagement Withfthe -ar'e--well =calculated to adequately fulfill the obpunch, and when turned to-lock thewrench-and jects a-nd-a'dvantagessetforthg 'it isto beunde'rpunch together, may be used to pull thepunch "stood-that the 'invention is=susceptible-to=-v-ariaaxially from its socket andthrou'gh thestripper tionymodification and change-withinthc spiritand plate (after, of course, firstreleasingthe retainer scope- 0f thesubjoinedclaims. 100

by meansofplunger18). Insimilanfashion, by -What'l claim -is: a-reverse-operation; anew punchniaybe inserted. 1."In o b a w hp fl fi "Whether the threads; by which the wrench "and ''ing' a punch-holder, a punehmeta-iner'carriedby tool are adapted to be locked together are of'the "thepunch liolder having'a punch-socket"therein 3 complete-screw'type or the "shorter bayonet type, andincl-uding; =mecha nism for"quickly-releasin or other equivalent interlocking cam or lug'cona-punch held thereby,a strippenplate also carstruction be used; is'of course iinmaterialythe im- --ried*-by-'the punch=holder; -a-rranged beneath the portant. consideration; being that means carried 'retai-ner and having a-clearanceaperturefor the by: aheavier portion-"of'thetool be provided .enpu.11'-cl1---therein, -'said'- stripper plaite"also having ablinglockingthewrench and tool together'in an-a-perture-therein-toenaible actuation-frombea-manner not interfering withaxial'movement f ineath ofthe'punch releasing-mechanismcarried the tool 'andwrenchthroughthe confined space by 'theisuperiorly-positionedretainer; a pun'ch "in .--provided"by-th'e clearance aperture 'initheistrip- "'the-socket-having a shankportion and a -working' per plate. portion; the"working" portion 'being'tmaterially Asshown-inthe modifieddisclosure of Figure'3, *smallerithanithe :clearance"aperturenmthe a--male'wrench," as 32 rnay.be1used,. and'lthe stripperfplataanda -deformedportiorr'carried by -pun'ch,-' designated; 126 axially "drilled fromits "the" shankof the punch -adaipted"*to=--be-engaged free working:end,preferably intothe'shank'where by 'an extracting tool: projecteditl'rrou'ghthe athread'ed-portion, designated-30 ,fis provided. 'clearan'ceaperture-to engage thesame. v "With'this threaded portionitheend of the wrench 22in combinationwith aimpresshalvirignqm is of course complementarilythreaded to mesh, reciprocable punch"holder,'a'socketed portion carand it-willbeseen-that when the-wrench is screwed B B Y and adapt to receive l into engagementtherewith itzmay'heusedjto exv h QC el a able"re ainingmeansfrfoi holdtract; or-insert a puncli in a mannersimilar to ing'the punch in the socket; a; stripperplatexcar 'theoperation ofr'theifirstijdcscribedembodiment. .r ed by the'punclr"holder'apertured fort-passage"- "This-construction enables useiof such .a special fth :r u h rethmugh' n rfp punch and extracting and handling wrenchywhere J'8Cting below the p i a G i lY m d forone-reason or another it is not desiredrtoprol D I i' LCaTIiEd bYthepunch and. adapted "videpa sufficientlylargefclearance aperture. in the meae "b jerapp n "t h ustz r u .v stripper plate-to permitfuse ofthe formfirstdetheaperture'inLthestripperplate; I i scribed; as is sometimes'the case wheniit' .isgde- 371K Combination With a metal formingdfivi'ce sired tonse "the aperture inthe zstripperfplate, n d n a r ciprocable head, a to l hold r caror in a bushing as v28 inserted therein; as arpilot eb releasable retaining? means fo sun- "-for the punch by-"arrangingjitto snugly "fi t the o t n 5601111113119 holder, aflm 'm elongated shank. 1 l V chine-projecting beneath "the tool andhamper- "Figures 4 'andfi illustrate another modification 6 hfi h v ne ancp u it in whi h e r bly Vplurality-50f"longjhfdjfial of sufficiientsize to allow removal ofitheto'oltheregrooves or flat's as 30 "are-formediimthe punch through and a! selectively di' m V I F shank and-extendingfpart waympthe sarn'ejfrorn ,pq i rr b he tool a d nsae a l iby, its lower-end. intersecting-the longitudinal flats l n x ra ting.wn nchthru t'through-the P I 1 or grooves qis a circumferential'fslot' 31 The v I v '7 wrench 32 is sockete'd somewhat'similarly to the V ".EIRANK "J'O R 

